CVE-2002-2443

Kerberos 5 vulnerability

CVSS

5.0

EPSS

6.5%

EPSS pct

93th

Exploited

No known

schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly validate UDP packets before sending responses, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by krb_pingpong.nasl, a related issue to CVE-1999-0103.

Affected vendor

Mit

Affected product

Kerberos 5

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2013-05-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 6.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2002-2443

Confirm whether Mit Kerberos 5 is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2002-2443.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2002-2443

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2002-2443 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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